68hta or PTE 6262

[WalshTSI]

So in the middle of having a 2.3 build with 8.5 compression stroker wiesco pistons and eagle H beam 22 wrist pin rods and eagle 100mm crank. I planned on using my old 68hta but I just purchased a PTE 6262 with dsm flange. Worried about my trans its a 5 speed that was rebuilt with all stock components. Really lost if I should ignore the 6262 and just continue to use the 68hta to save my transmission or if there is a way to use the 6262 and limit the stress on the trans. Also concerned how the 6262 will perform with a dsm flange. Looking for advice.

 

[CrackedDSM]

Asking this question is like asking if you should go turbo or supercharger. Those two turbos are worlds apart in power production and spool up time. The 68HTA is gonna hit hard and fast but Peter out up top compared to the 6262. The 6262 is exactly opposite.


It’d be easier to bolt on the 6262 and just keep the timing and boost relatively low but the spool would suck. In my opinion at least.


Others can chime in on transmission longevity between the two turbos. I’d say torque is the enemy but I’m a M/T newb.

 

[WalshTSI]

That's the feeling ive been having, I wanted a larger turbo but was unaware if I overshot with the 6262. Was hoping the 2.3 would help with the lag which is why i did go forward with buying it but that caused the concern for the transmission after. This won't be on the strip just was looking for a pretty crazy street car

 

[WalshTSI]

Also be using 272 cams with an evo 3 intake and exhaust manifold which hoped the IM would give more low end torque and the evo3 exhaust manifold to help with the lag

 

[jdxnc]

My opinion, the 2.3 is going to create a lot of unwanted torque with the 5 speed, throw the 6262 on it and push the torque curve higher up in the rpm range to help save the transmission.

 

[WalshTSI]

Do you think it would be better than the 68hta? Possibly because like you mentioned the torque will be higher? Any experience with having the 6262 on a 2.3 from anyone? This is going to be a street car so still want to retain some of its usability in the lower rpms. Obviously it'll never see really more than 7000 rpms and didnt know how much that will leave me in that turbo.

 

[WalshTSI]

The goal really is to achieve around 550-600 possibly on pump. If someone also knows of a better turbo feel free to share

 

[jdxnc]

Do you think it would be better than the 68hta? Possibly because like you mentioned the torque will be higher? Any experience with having the 6262 on a 2.3 from anyone? This is going to be a street car so still want to retain some of its usability in the lower rpms. Obviously it'll never see really more than 7000 rpms and didnt know how much that will leave me in that turbo.

68hta will hit peak torque WAY sooner which is worse for the transmission. That turbo will be past it's peak output before 7000rpm.

 

[WalshTSI]

Good to know thank you. I was unsure how the transmission would react to once the torque hit using the 6262 if it would be automatically catastrophic with the addition its going to be a stock flange as well as 2.3. I know its honestly a recepie for disaster buy hoping there's a possibility it could be set up correctly where its fun on the street yet not dangerous to the drivetrain. I've looked into things to help like a diff and transfer case cover as well as diff bushings. Anything else that could help relieve some of pressure on these weak parts? I know biggest concern is the center diff but without replacing it unsure how to help it

 

[curt-s]

It all depends on what "fun on the street" means. Do you like hanging RPMs above 4K all the time?

Peeling the teeth off third gear is going to be a huge weak point. 550-600 on the stock trans is basically a recipe for disaster, especially with significant enough low end torque. The other question is, would the 68HTA even be capable of 550bhp.


So I have a v3, which is supposed to spool similar to the v1. By the website, FP says they're both 51lb/min but I thought the 68HTA was 47lb/min or so. My airflow showed 40lb/min just under 5K rpm.
Anyhoo, with a 8.5:1 on a 2.0L, you're not making 20psi until after 4k in second and 3800 in third.
However, at 4200 and above, you can go from 0 to 27psi in under a second (0.9 to be exact) and hit that 27 by 4700. I don't have high hopes for my trans longevity playing around with that.

Now, take your 2.3L, shift that powerband downward, and you're going to be playing with fire with a 68HTA.

 

[WalshTSI]

I knew the 68hta wouldn't achieve the 550 i was hoping for which caused me to jump on the sale of a 6262. With that being said I simply assumed the 6262 would be worse rather than the 68hta for the reason of producing more power thinking it would also produce more torque in the upper region but now I understand that is not the case. So the 68hta is definitely not going to be used on this set up. Now hanging around 4000 rpms all the time, im hoping with the 2.3 and evo 3 IM ill have enough low end torque to keep me engaged. Curious if any one has any other recommendations that could help me achieve these goals safely. I do have evo 3 gears in the future because I knew this build was going to be a problem for when 3rd or 4th are shredded but I would like to hold out as long as I can obviously